Pencils cost $0.49 each. You estimate the cost as $0.50 each. How many pencils do you need to buy for your estimate to differ from the actual cost by $2.00?
3 answers
At $.01 difference for each pencil, you need 200.
200
Correct! If the actual cost is $0.49 each, and you estimate the cost as $0.50 each, then the difference in cost for each pencil is $0.01. To have a difference of $2.00, you need to divide $2.00 by $0.01 to get 200. Therefore, you would need to buy 200 pencils.